The Vaude Ultra Hiker 15 Daysack is an ultra-lightweight & compact pack with a ventilated back system to offer you an excellent level of comfort making it ideal for exploring the great outdoors on your bike & on day hikes The Ultra Hiker weighs in at just under 500g making it one of the lightest technical bags in its class while this model offers a capacity of 15 litres across a well sized main compartment two mesh side pockets & two zipped pockets on the lid making it the perfect bag to grab & take out with you on a beautiful warm sunny day The back system on this daysack offers a fantastic level of comfort thanks to the Aeroflex full ventilation suspension system that features a large space between a mesh frame & the pack to ensure that this pack remains lightweight & offers perfect ventilation for your back so you can stay comfortable & carry all your necessities when you go out on an adventure